Leather-skiving machine



(No Model.) 2 Sheets-Sheet 1.

G. E. STOGKWELL.

LEATHER SKIVING MACHINE.

No. 310,742. Patented Jan. 13,1885.

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(Np Model.) 2 Sheets-Sheet 2.

G. E. STOOKWELL. LEATHER SKI VING MACHINE.

No. 310,742. Patented Jan. 13, 1885.

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GEORGE E. STOQKWELL, OF MARBLEHEAD, MASSACHUSETTS.

LEATHER-SKIVING MACi-HNE.

ESPBCIPIGATION forming part of Letters Patent No. 310,742, dated January 13, 1885.

Application filed July 11, 1884. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE E. S'roeKwELL, of Marblehead, in the county of Essex and State of Massachusetts, have invented a new and useful Improvement in Leather-Skiving Machines, of which the followingis a specification.

My invention relates to machines for skiving leather, particularly that class of machines used for skiving shoetips, and the object of my invention is to provide a cheap, simple, and convenient machine, which shall obviate the objections existing in this class of machines as heretofore constructed and now in use; and

it consists in the construction, combination, and arrangement of a rocking mold and rocking feeder, and in the other mechanical devices forming the machine, as hereinafter more fully described, and set forth in the claims.

Figure 1 represents a side elevation of a leather-skiving machine constructed according to my invention, showing the rocker-mold and feeder at the middle of their movement. Fig. 2 represents a top plan of the same. Fig. 3 represents an end elevation of the rear end of the machine, showing the rocker-mold and rocker-feeder at their central point of movement. Fig. 4 represents avertical longitudinal section of the machine, showing the rockermold and rocker-feeder at their extreme point of movement preparatory to receiving the end of a tip to be skived as it is drawn between the same by their reverse movement.

A represents the bed-frame or support of the machine, to which is secured the table B, and from the bed-frame A. extends the vertical post 0, to the bifurcated upper end of which is secured the journal-bearings and boxes D of the journal ofthe driving-pulley G, the inward end of which journal has secured thereto the crankarm E, to the outward end of which is adj ustably connected the connecting-bar F, the opposite end of which is pivoted to the reciproeating or sliding carrier-frame H, one end portion of which is provided upon its top and bottom face with horizontal rack-bars I, the gears and the gears of the bottom one engage with the pinion M, secured upon the end of the journal ofthe rocker-feeder N, which has bearings within boxes provided upon the yielding end portion of the yoke-frame O, the opposite end of which is pivoted to the support or arm 1?, as shown. The yielding end of the said yoke-frame O has provided beneath the same a suitable spring, Q, which has a bearing at its lower end upon a projection or lug, R, which is provided with a set-screw bolt, S, by which the pressure of the said spring upon the yokeframe may be regulated or adjusted, so as to hold the said rocker-feeder N against the stock as it passes over its side, causing its corrugations to take hold of the leather and feed or force it against theknife T, adj ustably secured upon the upper end of the adjustable knife rest U by set-screws, as shown. The rockermold K, in crosssection, is formed segmental or semi-cylindric, and slid upon its rocker foundation K, and retained thereon by the longitudinal lips or flanges a, formed upon opposite edges of the said removable mold portion-K, and projecting inwardly therefrom and in contact with the flat-face portion of the said foundation K, which may be provided with a suitable spring-catch, c, or other means of fastening desired. Theleather or tip about to be skived is held or forced into the irregular cavity forming the mold by the vertical springpresscrs 6, having journaled within their upper ends the friction-rolls i, and their lower end portions surrounded by the spiral springs I), having a bearing at the lower end upon the guide-piece d, through which the lower end portion of the presser eslides as it is depressed by the mold, it being retained in a vertical position by means of the upper guide-piece, f, and the oblong opening g, formed therein and through which the journal h of the feed-rocker passes, as shown in Fig. 4..

In order to adjust the knife T in and out of the plane of the rocking feeder and mold, the knife-rest U is pivoted mid-length between the supports V, and its lower end provided with a movable screw-threaded nut, 10, whereby it may be moved in either direction desired by means of the screw-rod Z, provided with a crank-handle, m, as shown in Fig. 3, and raised vertically by screw-bolt t.

The tips to be skived are placed in or between the adjustable forked holders VV,which receive the points or opposite ends of the tips therein, the tips being withdrawn one at a time from the bottom of the pile by the perforated sliding carrier-plate Z, provided with adj ustable guide-pins and connected with the horizontal adjusting screw-rod Y, underneath the said table B, and adapted to be rotated within bearings extending downward from the sliding frame X, fitted within dovetailed recess or guides beneath the table, and connected with the slotted end portion of the horizontal carrier-frame H by means of a connecting-bar, s, as shown. The knife-rest U, and its supportframe V, may be adjusted Vertically by means of the screw-bolt t, having a bearing with the lugs a, formed upon the bed-frame support A of the machine. The sliding carrier-plate Z reciprocates within a depression formed in the top of the table B, and its upper surface is flush with the surface of the table, one edge of which is provided with an adjustable guide, 13, and has provided within an inclined groove a guide-roll, E, provided with a spiral-spring, F, so that the curved or irregular edge of the tip may bear against the friction-roll E, as it passes between the feeder and mold, the said spring yielding and expanding corresponding with the formation of the edge of the tip passing by the said friction guide-roll E. It will be seen and understood that the said rocking 'feeder N is constructed of two or more segmental sections and secured upon the journal of the same, leaving a space intervening, into which is fitted the said vertical spring-presser c, carrying the said friction-roll-t', as shown in Fig. 4.

Having thus described my invention, what I claim is- 0 1. The combination of the rocker-mold K, having the pinion J, the rocker-feeder N, having the pinion M, the horizontal sliding rackbars I, provided upon the carrier-frame H, crank-arm E, and connecting-bar F, substantially as described.

2. The combination, with the rocking mold K and rocking feeder N, of the vertical springpresser 6, having the friction-roll i, substantially as described,

3. The combination, with the rocking mold K and rocking feeder N, of the adjustable forked holders 7, sliding carrier-plate Z, and spring guide-roll E,substantiall y as described.

4. The combination, with the mold K and feeder N, of the adjustable knife T, rest U, supports V, screw-rod Z, and nut 7c, substantially as described.

GEORGE E. STOOKXVELL.

Witnesses:

SYLvENUs WALKER, CHAS. S. GOODING. 

